﻿// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#nullable disable

using System.ComponentModel;
using System.Drawing;
using System.Reflection;
using System.Windows.Forms.TestUtilities;
using Point = System.Drawing.Point;
using Size = System.Drawing.Size;

namespace System.Windows.Forms.Tests;

public class ContainerControlTests
{
    [WinFormsFact]
    public void ContainerControl_Ctor_Default()
    {
        using SubContainerControl control = new();
        Assert.Null(control.AccessibleDefaultActionDescription);
        Assert.Null(control.AccessibleDescription);
        Assert.Null(control.AccessibleName);
        Assert.Null(control.ActiveControl);
        Assert.Equal(AccessibleRole.Default, control.AccessibleRole);
        Assert.False(control.AllowDrop);
        Assert.Equal(AnchorStyles.Top | AnchorStyles.Left, control.Anchor);
        Assert.False(control.AutoScroll);
        Assert.Equal(SizeF.Empty, control.AutoScaleDimensions);
        Assert.Equal(new SizeF(1, 1), control.AutoScaleFactor);
        Assert.Equal(Size.Empty, control.AutoScrollMargin);
        Assert.Equal(AutoScaleMode.Inherit, control.AutoScaleMode);
        Assert.Equal(Size.Empty, control.AutoScrollMinSize);
        Assert.Equal(Point.Empty, control.AutoScrollPosition);
        Assert.False(control.AutoSize);
        Assert.Equal(AutoValidate.EnablePreventFocusChange, control.AutoValidate);
        Assert.Equal(Control.DefaultBackColor, control.BackColor);
        Assert.Null(control.BackgroundImage);
        Assert.Equal(ImageLayout.Tile, control.BackgroundImageLayout);
        Assert.NotNull(control.BindingContext);
        Assert.Same(control.BindingContext, control.BindingContext);
        Assert.Equal(0, control.Bottom);
        Assert.Equal(Rectangle.Empty, control.Bounds);
        Assert.False(control.CanEnableIme);
        Assert.False(control.CanFocus);
        Assert.True(control.CanRaiseEvents);
        Assert.True(control.CanSelect);
        Assert.False(control.Capture);
        Assert.True(control.CausesValidation);
        Assert.Equal(Rectangle.Empty, control.ClientRectangle);
        Assert.Equal(Size.Empty, control.ClientSize);
        Assert.Null(control.Container);
        Assert.False(control.ContainsFocus);
        Assert.Null(control.ContextMenuStrip);
        Assert.Empty(control.Controls);
        Assert.Same(control.Controls, control.Controls);
        Assert.False(control.Created);
        Assert.Equal(SizeF.Empty, control.CurrentAutoScaleDimensions);
        Assert.Equal(Cursors.Default, control.Cursor);
        Assert.Equal(Cursors.Default, control.DefaultCursor);
        Assert.Equal(ImeMode.Inherit, control.DefaultImeMode);
        Assert.Equal(new Padding(3), control.DefaultMargin);
        Assert.Equal(Size.Empty, control.DefaultMaximumSize);
        Assert.Equal(Size.Empty, control.DefaultMinimumSize);
        Assert.Equal(Padding.Empty, control.DefaultPadding);
        Assert.Equal(Size.Empty, control.DefaultSize);
        Assert.False(control.DesignMode);
        Assert.Equal(Rectangle.Empty, control.DisplayRectangle);
        Assert.Equal(DockStyle.None, control.Dock);
        Assert.NotNull(control.DockPadding);
        Assert.Same(control.DockPadding, control.DockPadding);
        Assert.Equal(0, control.DockPadding.Top);
        Assert.Equal(0, control.DockPadding.Bottom);
        Assert.Equal(0, control.DockPadding.Left);
        Assert.Equal(0, control.DockPadding.Right);
        Assert.False(control.DoubleBuffered);
        Assert.True(control.Enabled);
        Assert.NotNull(control.Events);
        Assert.Same(control.Events, control.Events);
        Assert.False(control.Focused);
        Assert.Equal(Control.DefaultFont, control.Font);
        Assert.Equal(control.Font.Height, control.FontHeight);
        Assert.Equal(Control.DefaultForeColor, control.ForeColor);
        Assert.False(control.HasChildren);
        Assert.Equal(0, control.Height);
        Assert.NotNull(control.HorizontalScroll);
        Assert.Same(control.HorizontalScroll, control.HorizontalScroll);
        Assert.False(control.HScroll);
        Assert.Equal(ImeMode.NoControl, control.ImeMode);
        Assert.Equal(ImeMode.NoControl, control.ImeModeBase);
        Assert.False(control.IsAccessible);
        Assert.False(control.IsMirrored);
        Assert.NotNull(control.LayoutEngine);
        Assert.Same(control.LayoutEngine, control.LayoutEngine);
        Assert.Equal(0, control.Left);
        Assert.Equal(Point.Empty, control.Location);
        Assert.Equal(new Padding(3), control.Margin);
        Assert.Equal(Size.Empty, control.MaximumSize);
        Assert.Equal(Size.Empty, control.MinimumSize);
        Assert.Equal(Padding.Empty, control.Padding);
        Assert.Null(control.Parent);
        Assert.Equal(Size.Empty, control.PreferredSize);
        Assert.Equal("Microsoft\u00AE .NET", control.ProductName);
        Assert.False(control.RecreatingHandle);
        Assert.Null(control.Region);
        Assert.False(control.ResizeRedraw);
        Assert.Equal(0, control.Right);
        Assert.Equal(RightToLeft.No, control.RightToLeft);
        Assert.True(control.ShowFocusCues);
        Assert.True(control.ShowKeyboardCues);
        Assert.Null(control.Site);
        Assert.Equal(Size.Empty, control.Size);
        Assert.Equal(0, control.TabIndex);
        Assert.True(control.TabStop);
        Assert.Empty(control.Text);
        Assert.Equal(0, control.Top);
        Assert.Null(control.TopLevelControl);
        Assert.False(control.UseWaitCursor);
        Assert.True(control.Visible);
        Assert.NotNull(control.VerticalScroll);
        Assert.Same(control.VerticalScroll, control.VerticalScroll);
        Assert.False(control.VScroll);
        Assert.Equal(0, control.Width);

        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ContainerControl_CreateParams_GetDefault_ReturnsExpected()
    {
        using SubContainerControl control = new();
        CreateParams createParams = control.CreateParams;
        Assert.Null(createParams.Caption);
        Assert.Null(createParams.ClassName);
        Assert.Equal(0x8, createParams.ClassStyle);
        Assert.Equal(0x10000, createParams.ExStyle);
        Assert.Equal(0, createParams.Height);
        Assert.Equal(IntPtr.Zero, createParams.Parent);
        Assert.Null(createParams.Param);
        Assert.Equal(0x56010000, createParams.Style);
        Assert.Equal(0, createParams.Width);
        Assert.Equal(0, createParams.X);
        Assert.Equal(0, createParams.Y);
        Assert.Same(createParams, control.CreateParams);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ContainerControl_ActiveContainerControl_Set_GetReturnsExpected()
    {
        using ContainerControl control = new();
        using Control child = new();
        Control grandchild = new();
        control.Controls.Add(child);
        child.Controls.Add(grandchild);

        control.ActiveControl = child;
        Assert.Same(child, control.ActiveControl);

        // Set same.
        control.ActiveControl = child;
        Assert.Same(child, control.ActiveControl);

        // Set grandchild.
        control.ActiveControl = grandchild;
        Assert.Same(grandchild, control.ActiveControl);

        // Set null.
        control.ActiveControl = null;
        Assert.Null(control.ActiveControl);
    }

    [WinFormsFact]
    public void ContainerControl_ActiveContainerControl_SetInvalid_ThrowsArgumentException()
    {
        using ContainerControl control = new();
        Assert.Throws<ArgumentException>("value", () => control.ActiveControl = control);
        Assert.Throws<ArgumentException>("value", () => control.ActiveControl = new Control());
    }

    [WinFormsTheory]
    [CommonMemberData(typeof(CommonTestHelper), nameof(CommonTestHelper.GetSizeTheoryData), TestIncludeType.NoNegatives)]
    public void ContainerControl_AutoScaleDimensions_Set_GetReturnsExpected(Size value)
    {
        using ContainerControl control = new()
        {
            AutoScaleDimensions = value
        };
        Assert.Equal(value, control.AutoScaleDimensions);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.AutoScaleDimensions = value;
        Assert.Equal(value, control.AutoScaleDimensions);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [CommonMemberData(typeof(CommonTestHelper), nameof(CommonTestHelper.GetSizeTheoryData), TestIncludeType.NoNegatives)]
    public void ContainerControl_AutoScaleDimensions_SetWithChildren_GetReturnsExpected(Size value)
    {
        using Control child = new();
        using ContainerControl control = new();
        control.Controls.Add(child);

        control.AutoScaleDimensions = value;
        Assert.Equal(value, control.AutoScaleDimensions);

        // Set same.
        control.AutoScaleDimensions = value;
        Assert.Equal(value, control.AutoScaleDimensions);
    }

    [WinFormsTheory]
    [CommonMemberData(typeof(CommonTestHelper), nameof(CommonTestHelper.GetSizeTheoryData), TestIncludeType.NoPositives)]
    public void ContainerControl_AutoScaleDimensions_SetInvalid_ThrowsArgumentOutOfRangeException(Size value)
    {
        using ContainerControl control = new();
        Assert.Throws<ArgumentOutOfRangeException>("value", () => control.AutoScaleDimensions = value);
    }

    [WinFormsTheory]
    [EnumData<AutoScaleMode>]
    public void ContainerControl_AutoScaleMode_Set_GetReturnsExpected(AutoScaleMode value)
    {
        using ContainerControl control = new()
        {
            AutoScaleMode = value
        };
        Assert.Equal(value, control.AutoScaleMode);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.AutoScaleMode = value;
        Assert.Equal(value, control.AutoScaleMode);
        Assert.False(control.IsHandleCreated);
    }

    public static IEnumerable<object[]> AutoScaleMode_SetWithCustomOldValue_TestData()
    {
        yield return new object[] { AutoScaleMode.None, SizeF.Empty };
        yield return new object[] { AutoScaleMode.Dpi, new SizeF(96, 96) };
        yield return new object[] { AutoScaleMode.Inherit, SizeF.Empty };
    }

    [WinFormsTheory]
    [MemberData(nameof(AutoScaleMode_SetWithCustomOldValue_TestData))]
    public void ContainerControl_AutoScaleMode_SetWithCustomOldValue_ResetsAutoScaleDimensions(AutoScaleMode value, SizeF expectedAutoScaleDimensions)
    {
        using ContainerControl control = new()
        {
            AutoScaleDimensions = new SizeF(1, 2),
            AutoScaleMode = AutoScaleMode.Font
        };

        control.AutoScaleMode = value;
        Assert.Equal(value, control.AutoScaleMode);
        Assert.Equal(expectedAutoScaleDimensions, control.AutoScaleDimensions);
        Assert.Equal(expectedAutoScaleDimensions, control.CurrentAutoScaleDimensions);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.AutoScaleMode = value;
        Assert.Equal(value, control.AutoScaleMode);
        Assert.Equal(expectedAutoScaleDimensions, control.AutoScaleDimensions);
        Assert.Equal(expectedAutoScaleDimensions, control.CurrentAutoScaleDimensions);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InvalidEnumData<AutoScaleMode>]
    public void ContainerControl_AutoScaleMode_SetInvalid_ThrowsInvalidEnumArgumentException(AutoScaleMode value)
    {
        using ContainerControl control = new();
        Assert.Throws<InvalidEnumArgumentException>("value", () => control.AutoScaleMode = value);
    }

    public static IEnumerable<object[]> AutoValidate_Set_TestData()
    {
        yield return new object[] { AutoValidate.Disable, AutoValidate.Disable };
        yield return new object[] { AutoValidate.EnablePreventFocusChange, AutoValidate.EnablePreventFocusChange };
        yield return new object[] { AutoValidate.EnableAllowFocusChange, AutoValidate.EnableAllowFocusChange };
        yield return new object[] { AutoValidate.Inherit, AutoValidate.EnablePreventFocusChange };
    }

    [WinFormsTheory]
    [MemberData(nameof(AutoValidate_Set_TestData))]
    public void UserControl_AutoValidate_Set_GetReturnsExpected(AutoValidate value, AutoValidate expected)
    {
        using ContainerControl control = new()
        {
            AutoValidate = value
        };
        Assert.Equal(expected, control.AutoValidate);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.AutoValidate = value;
        Assert.Equal(expected, control.AutoValidate);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ContainerControl_AutoValidate_SetWithHandler_CallsAutoValidateChanged()
    {
        using ContainerControl control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.AutoValidateChanged += handler;

        // Set different.
        control.AutoValidate = AutoValidate.EnablePreventFocusChange;
        Assert.Equal(AutoValidate.EnablePreventFocusChange, control.AutoValidate);
        Assert.Equal(1, callCount);

        // Set same.
        control.AutoValidate = AutoValidate.EnablePreventFocusChange;
        Assert.Equal(AutoValidate.EnablePreventFocusChange, control.AutoValidate);
        Assert.Equal(1, callCount);

        // Set different.
        control.AutoValidate = AutoValidate.EnableAllowFocusChange;
        Assert.Equal(AutoValidate.EnableAllowFocusChange, control.AutoValidate);
        Assert.Equal(2, callCount);

        // Remove handler.
        control.AutoValidateChanged -= handler;
        control.AutoValidate = AutoValidate.Disable;
        Assert.False(control.AutoSize);
        Assert.Equal(2, callCount);
    }

    [WinFormsTheory]
    [InvalidEnumData<AutoValidate>]
    public void ContainerControl_AutoValidate_SetInvalidValue_ThrowsInvalidEnumArgumentException(AutoValidate value)
    {
        using ContainerControl control = new();
        Assert.Throws<InvalidEnumArgumentException>("value", () => control.AutoValidate = value);
    }

    [WinFormsFact]
    public void ContainerControl_BindingContext_Set_GetReturnsExpected()
    {
        BindingContext value = [];
        using ContainerControl control = new()
        {
            BindingContext = value
        };
        Assert.Same(value, control.BindingContext);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.BindingContext = value;
        Assert.Same(value, control.BindingContext);
        Assert.False(control.IsHandleCreated);

        // Set null.
        control.BindingContext = null;
        Assert.NotNull(control.BindingContext);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ContainerControl_BindingContext_SetWithHandler_CallsBindingContextChanged()
    {
        using ContainerControl control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.BindingContextChanged += handler;

        // Set different.
        BindingContext value1 = [];
        control.BindingContext = value1;
        Assert.Same(value1, control.BindingContext);
        Assert.Equal(1, callCount);

        // Set same.
        control.BindingContext = value1;
        Assert.Same(value1, control.BindingContext);
        Assert.Equal(1, callCount);

        // Set different.
        BindingContext value2 = [];
        control.BindingContext = value2;
        Assert.Equal(value2, control.BindingContext);
        Assert.Equal(2, callCount);

        // Remove handler.
        BindingContext value3 = [];
        control.BindingContextChanged -= handler;
        control.BindingContext = value3;
        Assert.Same(value3, control.BindingContext);
        Assert.Equal(2, callCount);
    }

    [WinFormsTheory]
    [CommonMemberData(typeof(CommonTestHelperEx), nameof(CommonTestHelperEx.GetFontTheoryData))]
    public void ContainerControl_Font_Set_GetReturnsExpected(Font value)
    {
        using SubContainerControl control = new()
        {
            Font = value
        };
        Assert.Equal(value ?? Control.DefaultFont, control.Font);
        Assert.Equal(control.Font.Height, control.FontHeight);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.Font = value;
        Assert.Equal(value ?? Control.DefaultFont, control.Font);
        Assert.Equal(control.Font.Height, control.FontHeight);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [CommonMemberData(typeof(CommonTestHelperEx), nameof(CommonTestHelperEx.GetFontTheoryData))]
    public void ContainerControl_Font_SetWithAutoScaleModeFont_GetReturnsExpected(Font value)
    {
        using SubContainerControl control = new()
        {
            AutoScaleMode = AutoScaleMode.Font
        };

        control.Font = value;
        Assert.Equal(value ?? Control.DefaultFont, control.Font);
        Assert.Equal(control.Font.Height, control.FontHeight);
        Assert.Equal(new Size(1, 1), control.AutoScaleFactor);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.Font = value;
        Assert.Equal(value ?? Control.DefaultFont, control.Font);
        Assert.Equal(control.Font.Height, control.FontHeight);
        Assert.Equal(new Size(1, 1), control.AutoScaleFactor);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ContainerControl_Font_SetWithHandler_CallsFontChanged()
    {
        using ContainerControl control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.FontChanged += handler;

        // Set different.
        using Font font1 = new("Arial", 8.25f);
        control.Font = font1;
        Assert.Same(font1, control.Font);
        Assert.Equal(1, callCount);

        // Set same.
        control.Font = font1;
        Assert.Same(font1, control.Font);
        Assert.Equal(1, callCount);

        // Set different.
        using var font2 = SystemFonts.DialogFont;
        control.Font = font2;
        Assert.Same(font2, control.Font);
        Assert.Equal(2, callCount);

        // Set null.
        control.Font = null;
        Assert.Equal(Control.DefaultFont, control.Font);
        Assert.Equal(3, callCount);

        // Remove handler.
        control.FontChanged -= handler;
        control.Font = font1;
        Assert.Same(font1, control.Font);
        Assert.Equal(3, callCount);
    }

    [WinFormsFact]
    public void ContainerControl_GetAutoSizeMode_Invoke_ReturnsExpected()
    {
        using SubContainerControl control = new();
        Assert.Equal(AutoSizeMode.GrowOnly, control.GetAutoSizeMode());
    }

    [WinFormsTheory]
    [InlineData(0, true)]
    [InlineData(SubContainerControl.ScrollStateAutoScrolling, false)]
    [InlineData(SubContainerControl.ScrollStateFullDrag, false)]
    [InlineData(SubContainerControl.ScrollStateHScrollVisible, false)]
    [InlineData(SubContainerControl.ScrollStateUserHasScrolled, false)]
    [InlineData(SubContainerControl.ScrollStateVScrollVisible, false)]
    [InlineData(int.MaxValue, false)]
    [InlineData((-1), false)]
    public void ContainerControl_GetScrollState_Invoke_ReturnsExpected(int bit, bool expected)
    {
        using SubContainerControl control = new();
        Assert.Equal(expected, control.GetScrollState(bit));
    }

    [WinFormsTheory]
    [InlineData(ControlStyles.ContainerControl, true)]
    [InlineData(ControlStyles.UserPaint, true)]
    [InlineData(ControlStyles.Opaque, false)]
    [InlineData(ControlStyles.ResizeRedraw, false)]
    [InlineData(ControlStyles.FixedWidth, false)]
    [InlineData(ControlStyles.FixedHeight, false)]
    [InlineData(ControlStyles.StandardClick, true)]
    [InlineData(ControlStyles.Selectable, true)]
    [InlineData(ControlStyles.UserMouse, false)]
    [InlineData(ControlStyles.SupportsTransparentBackColor, false)]
    [InlineData(ControlStyles.StandardDoubleClick, true)]
    [InlineData(ControlStyles.AllPaintingInWmPaint, false)]
    [InlineData(ControlStyles.CacheText, false)]
    [InlineData(ControlStyles.EnableNotifyMessage, false)]
    [InlineData(ControlStyles.DoubleBuffer, false)]
    [InlineData(ControlStyles.OptimizedDoubleBuffer, false)]
    [InlineData(ControlStyles.UseTextForAccessibility, true)]
    [InlineData((ControlStyles)0, true)]
    [InlineData((ControlStyles)int.MaxValue, false)]
    [InlineData((ControlStyles)(-1), false)]
    public void ContainerControl_GetStyle_Invoke_ReturnsExpected(ControlStyles flag, bool expected)
    {
        using SubContainerControl control = new();
        Assert.Equal(expected, control.GetStyle(flag));

        // Call again to test caching.
        Assert.Equal(expected, control.GetStyle(flag));
    }

    [WinFormsFact]
    public void ContainerControl_GetTopLevel_Invoke_ReturnsExpected()
    {
        using SubContainerControl control = new();
        Assert.False(control.GetTopLevel());
    }

    [WinFormsTheory]
    [EnumData<AutoScaleMode>]
    public void PerformAutoScale_InvokeWithoutChildren_Success(AutoScaleMode autoScaleMode)
    {
        using SubContainerControl control = new()
        {
            AutoScaleMode = autoScaleMode
        };
        control.PerformAutoScale();
    }

    [WinFormsTheory]
    [EnumData<AutoScaleMode>]
    public void PerformAutoScale_InvokeWithChildren_Success(AutoScaleMode autoScaleMode)
    {
        using Control child = new();
        using SubContainerControl control = new()
        {
            AutoScaleMode = autoScaleMode
        };
        control.Controls.Add(child);
        control.PerformAutoScale();
    }

    [WinFormsFact]
    public void ContainerControl_CreateContainerControl_Invoke_CallsBindingContextChanged()
    {
        using ContainerControl control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.BindingContextChanged += handler;

        // Set different.
        BindingContext value1 = [];
        control.BindingContext = value1;
        Assert.Same(value1, control.BindingContext);
        Assert.Equal(1, callCount);

        // Set same.
        control.BindingContext = value1;
        Assert.Same(value1, control.BindingContext);
        Assert.Equal(1, callCount);

        // Set different.
        BindingContext value2 = [];
        control.BindingContext = value2;
        Assert.Equal(value2, control.BindingContext);
        Assert.Equal(2, callCount);

        // Remove handler.
        BindingContext value3 = [];
        control.BindingContextChanged -= handler;
        control.BindingContext = value3;
        Assert.Same(value3, control.BindingContext);
        Assert.Equal(2, callCount);
    }

    [WinFormsFact]
    public void ContainerControl_Dispose_Invoke_ResetsActiveControl()
    {
        using ContainerControl control = new();
        using Control child = new();
        control.Controls.Add(child);
        control.ActiveControl = child;

        control.Dispose();
        Assert.Null(control.ActiveControl);
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ContainerControl_OnAutoValidateChanged_Invoke_CallsAutoValidateChanged(EventArgs eventArgs)
    {
        using SubContainerControl control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.AutoValidateChanged += handler;
        control.OnAutoValidateChanged(eventArgs);
        Assert.Equal(1, callCount);

        // Remove handler.
        control.AutoValidateChanged -= handler;
        control.OnAutoValidateChanged(eventArgs);
        Assert.Equal(1, callCount);
    }

    [WinFormsFact]
    public void UserControl_OnCreateControl_Invoke_Nop()
    {
        using SubContainerControl control = new();
        int bindingContextChangedCallCount = 0;
        control.BindingContextChanged += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            bindingContextChangedCallCount++;
        };
        control.OnCreateControl();
        Assert.False(control.Created);
        Assert.False(control.IsHandleCreated);
        Assert.Equal(1, bindingContextChangedCallCount);

        control.OnCreateControl();
        Assert.False(control.Created);
        Assert.False(control.IsHandleCreated);
        Assert.Equal(2, bindingContextChangedCallCount);
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ContainerControl_OnFontChanged_Invoke_CallsFontChanged(EventArgs eventArgs)
    {
        using SubContainerControl control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.FontChanged += handler;
        control.OnFontChanged(eventArgs);
        Assert.Equal(1, callCount);

        // Remove handler.
        control.FontChanged -= handler;
        control.OnFontChanged(eventArgs);
        Assert.Equal(1, callCount);
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ContainerControl_OnFontChanged_InvokeWithAutoScaleModeFont_CallsFontChanged(EventArgs eventArgs)
    {
        using SubContainerControl control = new()
        {
            AutoScaleMode = AutoScaleMode.Font
        };
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.FontChanged += handler;
        control.OnFontChanged(eventArgs);
        Assert.Equal(new Size(1, 1), control.AutoScaleFactor);
        Assert.Equal(1, callCount);

        // Remove handler.
        control.FontChanged -= handler;
        control.OnFontChanged(eventArgs);
        Assert.Equal(new Size(1, 1), control.AutoScaleFactor);
        Assert.Equal(1, callCount);
    }

    [WinFormsTheory]
    [CommonMemberData(typeof(CommonTestHelperEx), nameof(CommonTestHelperEx.GetLayoutEventArgsTheoryData))]
    public void ContainerControl_OnLayout_Invoke_CallsLayout(LayoutEventArgs eventArgs)
    {
        using SubContainerControl control = new();
        int callCount = 0;
        LayoutEventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.Layout += handler;
        control.OnLayout(eventArgs);
        Assert.Equal(1, callCount);

        // Remove handler.
        control.Layout -= handler;
        control.OnLayout(eventArgs);
        Assert.Equal(1, callCount);
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ContainerControl_OnParentChanged_Invoke_CallsParentChanged(EventArgs eventArgs)
    {
        using SubContainerControl control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.ParentChanged += handler;
        control.OnParentChanged(eventArgs);
        Assert.Equal(1, callCount);

        // Remove handler.
        control.ParentChanged -= handler;
        control.OnParentChanged(eventArgs);
        Assert.Equal(1, callCount);
    }

    [WinFormsFact]
    public void ContainerControl_UpdateDefaultButton_Invoke_Nop()
    {
        using SubContainerControl control = new();
        control.UpdateDefaultButton();
        control.UpdateDefaultButton();
    }

    [WinFormsFact]
    public void ContainerControl_ValidateChildren_InvokeWithoutChildren_ReturnsTrue()
    {
        using ContainerControl control = new();
        Assert.True(control.ValidateChildren());
    }

    public static IEnumerable<object[]> ValidateChildren_TestData()
    {
        yield return new object[] { true, 0 };
        yield return new object[] { false, 1 };
    }

    [WinFormsTheory]
    [MemberData(nameof(ValidateChildren_TestData))]
    public void ContainerControl_ValidateChildren_InvokeWithChildren_ReturnsExpected(bool cancel, int expectedCallCount)
    {
        using ContainerControl control = new();
        using Control child1 = new();
        using Control grandchild1 = new();
        child1.Controls.Add(grandchild1);
        using ContainerControl child2 = new();
        using Control grandchild2 = new();
        child2.Controls.Add(grandchild2);
        using TabControl child3 = new();
        using TabPage grandchild3 = new();
        child3.Controls.Add(grandchild3);
        using SubControl child4 = new();
        child4.SetStyle(ControlStyles.Selectable, false);
        using SubControl child5 = new()
        {
            Enabled = false
        };
        using SubControl child6 = new()
        {
            Visible = false
        };
        using SubControl child7 = new()
        {
            TabStop = false
        };
        using SubControl child8 = new()
        {
            CausesValidation = false
        };
        control.Controls.Add(child1);
        control.Controls.Add(child2);
        control.Controls.Add(child3);
        control.Controls.Add(child4);
        control.Controls.Add(child5);
        control.Controls.Add(child6);
        control.Controls.Add(child7);
        control.Controls.Add(child8);

        int validatingCallCount = 0;
        control.Validating += (sender, e) => validatingCallCount++;
        int validatedCallCount = 0;
        control.Validated += (sender, e) => validatedCallCount++;

        int child1ValidatingCallCount = 0;
        child1.Validating += (sender, e) =>
        {
            Assert.Same(child1, sender);
            Assert.False(e.Cancel);
            child1ValidatingCallCount++;
            e.Cancel = cancel;
        };
        int child1ValidatedCallCount = 0;
        child1.Validated += (sender, e) =>
        {
            Assert.Same(child1, sender);
            Assert.Same(EventArgs.Empty, e);
            child1ValidatedCallCount++;
        };
        int grandchild1ValidatingCallCount = 0;
        grandchild1.Validating += (sender, e) =>
        {
            Assert.Same(grandchild1, sender);
            Assert.False(e.Cancel);
            grandchild1ValidatingCallCount++;
        };
        int grandchild1ValidatedCallCount = 0;
        grandchild1.Validated += (sender, e) => grandchild1ValidatedCallCount++;
        int child2ValidatingCallCount = 0;
        child2.Validating += (sender, e) =>
        {
            Assert.Same(child2, sender);
            Assert.False(e.Cancel);
            child2ValidatingCallCount++;
        };
        int child2ValidatedCallCount = 0;
        child2.Validated += (sender, e) =>
        {
            Assert.Same(child2, sender);
            Assert.Same(EventArgs.Empty, e);
            child2ValidatedCallCount++;
        };
        int grandchild2ValidatingCallCount = 0;
        grandchild2.Validating += (sender, e) =>
        {
            Assert.Same(grandchild2, sender);
            Assert.False(e.Cancel);
            grandchild2ValidatingCallCount++;
        };
        int grandchild2ValidatedCallCount = 0;
        grandchild2.Validated += (sender, e) =>
        {
            Assert.Same(grandchild2, sender);
            Assert.Same(EventArgs.Empty, e);
            grandchild2ValidatedCallCount++;
        };
        int child3ValidatingCallCount = 0;
        child3.Validating += (sender, e) =>
        {
            Assert.Same(child3, sender);
            Assert.False(e.Cancel);
            child3ValidatingCallCount++;
        };
        int child3ValidatedCallCount = 0;
        child3.Validated += (sender, e) =>
        {
            Assert.Same(child3, sender);
            Assert.Same(EventArgs.Empty, e);
            child3ValidatedCallCount++;
        };
        int grandchild3ValidatingCallCount = 0;
        grandchild3.Validating += (sender, e) => grandchild3ValidatingCallCount++;
        int grandchild3ValidatedCallCount = 0;
        grandchild3.Validated += (sender, e) => grandchild3ValidatedCallCount++;
        int child4ValidatingCallCount = 0;
        child4.Validating += (sender, e) => child4ValidatingCallCount++;
        int child4ValidatedCallCount = 0;
        child4.Validated += (sender, e) => child4ValidatedCallCount++;
        int child5ValidatingCallCount = 0;
        child5.Validating += (sender, e) =>
        {
            Assert.Same(child5, sender);
            Assert.False(e.Cancel);
            child5ValidatingCallCount++;
        };
        int child5ValidatedCallCount = 0;
        child5.Validated += (sender, e) =>
        {
            Assert.Same(child5, sender);
            Assert.Same(EventArgs.Empty, e);
            child5ValidatedCallCount++;
        };
        int child6ValidatingCallCount = 0;
        child6.Validating += (sender, e) =>
        {
            Assert.Same(child6, sender);
            Assert.False(e.Cancel);
            child6ValidatingCallCount++;
        };
        int child6ValidatedCallCount = 0;
        child6.Validated += (sender, e) =>
        {
            Assert.Same(child6, sender);
            Assert.Same(EventArgs.Empty, e);
            child6ValidatedCallCount++;
        };
        int child7ValidatingCallCount = 0;
        child7.Validating += (sender, e) =>
        {
            Assert.Same(child7, sender);
            Assert.False(e.Cancel);
            child7ValidatingCallCount++;
        };
        int child7ValidatedCallCount = 0;
        child7.Validated += (sender, e) =>
        {
            Assert.Same(child7, sender);
            Assert.Same(EventArgs.Empty, e);
            child7ValidatedCallCount++;
        };
        int child8ValidatingCallCount = 0;
        child8.Validating += (sender, e) => child8ValidatingCallCount++;
        int child8ValidatedCallCount = 0;
        child8.Validated += (sender, e) => child8ValidatedCallCount++;

        Assert.Equal(!cancel, control.ValidateChildren());
        Assert.Equal(0, validatingCallCount);
        Assert.Equal(0, validatedCallCount);
        Assert.Equal(1, child1ValidatingCallCount);
        Assert.Equal(expectedCallCount, child1ValidatedCallCount);
        Assert.Equal(0, grandchild1ValidatingCallCount);
        Assert.Equal(0, grandchild1ValidatedCallCount);
        Assert.Equal(1, child2ValidatingCallCount);
        Assert.Equal(1, child2ValidatedCallCount);
        Assert.Equal(1, grandchild2ValidatingCallCount);
        Assert.Equal(1, grandchild2ValidatedCallCount);
        Assert.Equal(1, child3ValidatingCallCount);
        Assert.Equal(1, child3ValidatedCallCount);
        Assert.Equal(0, grandchild3ValidatingCallCount);
        Assert.Equal(0, grandchild3ValidatedCallCount);
        Assert.Equal(0, child4ValidatingCallCount);
        Assert.Equal(0, child4ValidatedCallCount);
        Assert.Equal(1, child5ValidatingCallCount);
        Assert.Equal(1, child5ValidatedCallCount);
        Assert.Equal(1, child6ValidatingCallCount);
        Assert.Equal(1, child6ValidatedCallCount);
        Assert.Equal(1, child7ValidatingCallCount);
        Assert.Equal(1, child7ValidatedCallCount);
        Assert.Equal(0, child8ValidatingCallCount);
        Assert.Equal(0, child8ValidatedCallCount);
    }

    [WinFormsTheory]
    [EnumData<ValidationConstraints>]
    public void ContainerControl_ValidateChildren_InvokeValidationConstraintsWithoutChildren_ReturnsTrue(ValidationConstraints validationConstraints)
    {
        using ContainerControl control = new();
        Assert.True(control.ValidateChildren(validationConstraints));
    }

    public static IEnumerable<object[]> ValidateChildren_ValidationConstraints_TestData()
    {
        yield return new object[] { ValidationConstraints.ImmediateChildren, true, 0, 0, 0, 1, 1, 1, 1 };
        yield return new object[] { ValidationConstraints.ImmediateChildren, false, 1, 0, 0, 1, 1, 1, 1 };

        yield return new object[] { ValidationConstraints.Selectable, true, 0, 1, 0, 0, 1, 1, 1 };
        yield return new object[] { ValidationConstraints.Selectable, false, 1, 1, 0, 0, 1, 1, 1 };

        yield return new object[] { ValidationConstraints.Enabled, true, 0, 1, 1, 1, 0, 1, 1 };
        yield return new object[] { ValidationConstraints.Enabled, false, 1, 1, 1, 1, 0, 1, 1 };

        yield return new object[] { ValidationConstraints.Visible, true, 0, 1, 0, 1, 1, 0, 1 };
        yield return new object[] { ValidationConstraints.Visible, false, 1, 1, 0, 1, 1, 0, 1 };

        yield return new object[] { ValidationConstraints.TabStop, true, 0, 1, 0, 1, 1, 1, 0 };
        yield return new object[] { ValidationConstraints.TabStop, false, 1, 1, 0, 1, 1, 1, 0 };

        yield return new object[] { ValidationConstraints.None, true, 0, 1, 1, 1, 1, 1, 1 };
        yield return new object[] { ValidationConstraints.None, false, 1, 1, 1, 1, 1, 1, 1 };

        yield return new object[] { ValidationConstraints.ImmediateChildren | ValidationConstraints.Selectable | ValidationConstraints.Enabled | ValidationConstraints.Visible | ValidationConstraints.TabStop, true, 0, 0, 0, 0, 0, 0, 0 };
        yield return new object[] { ValidationConstraints.ImmediateChildren | ValidationConstraints.Selectable | ValidationConstraints.Enabled | ValidationConstraints.Visible | ValidationConstraints.TabStop, false, 1, 0, 0, 0, 0, 0, 0 };
    }

    [WinFormsTheory]
    [MemberData(nameof(ValidateChildren_ValidationConstraints_TestData))]
    public void ContainerControl_ValidateChildren_InvokeValidationConstraintsWithChildren_ReturnsExpected(ValidationConstraints validationConstraints, bool cancel, int expectedChild1CallCount, int expectedGrandchild2CallCount, int expectedGrandchild3CallCount, int expectedChild4CallCount, int expectedChild5CallCount, int expectedChild6CallCount, int expectedChild7CallCount)
    {
        using ContainerControl control = new();
        using Control child1 = new();
        using Control grandchild1 = new();
        child1.Controls.Add(grandchild1);
        using ContainerControl child2 = new();
        using Control grandchild2 = new();
        child2.Controls.Add(grandchild2);
        using TabControl child3 = new();
        using TabPage grandchild3 = new();
        child3.Controls.Add(grandchild3);
        using SubControl child4 = new();
        child4.SetStyle(ControlStyles.Selectable, false);
        using SubControl child5 = new()
        {
            Enabled = false
        };
        using SubControl child6 = new()
        {
            Visible = false
        };
        using SubControl child7 = new()
        {
            TabStop = false
        };
        using SubControl child8 = new()
        {
            CausesValidation = false
        };
        control.Controls.Add(child1);
        control.Controls.Add(child2);
        control.Controls.Add(child3);
        control.Controls.Add(child4);
        control.Controls.Add(child5);
        control.Controls.Add(child6);
        control.Controls.Add(child7);
        control.Controls.Add(child8);

        int validatingCallCount = 0;
        control.Validating += (sender, e) => validatingCallCount++;
        int validatedCallCount = 0;
        control.Validated += (sender, e) => validatedCallCount++;

        int child1ValidatingCallCount = 0;
        child1.Validating += (sender, e) =>
        {
            Assert.Same(child1, sender);
            Assert.False(e.Cancel);
            child1ValidatingCallCount++;
            e.Cancel = cancel;
        };
        int child1ValidatedCallCount = 0;
        child1.Validated += (sender, e) =>
        {
            Assert.Same(child1, sender);
            Assert.Same(EventArgs.Empty, e);
            child1ValidatedCallCount++;
        };
        int grandchild1ValidatingCallCount = 0;
        grandchild1.Validating += (sender, e) =>
        {
            Assert.Same(grandchild1, sender);
            Assert.False(e.Cancel);
            grandchild1ValidatingCallCount++;
        };
        int grandchild1ValidatedCallCount = 0;
        grandchild1.Validated += (sender, e) => grandchild1ValidatedCallCount++;
        int child2ValidatingCallCount = 0;
        child2.Validating += (sender, e) =>
        {
            Assert.Same(child2, sender);
            Assert.False(e.Cancel);
            child2ValidatingCallCount++;
        };
        int child2ValidatedCallCount = 0;
        child2.Validated += (sender, e) =>
        {
            Assert.Same(child2, sender);
            Assert.Same(EventArgs.Empty, e);
            child2ValidatedCallCount++;
        };
        int grandchild2ValidatingCallCount = 0;
        grandchild2.Validating += (sender, e) =>
        {
            Assert.Same(grandchild2, sender);
            Assert.False(e.Cancel);
            grandchild2ValidatingCallCount++;
        };
        int grandchild2ValidatedCallCount = 0;
        grandchild2.Validated += (sender, e) =>
        {
            Assert.Same(grandchild2, sender);
            Assert.Same(EventArgs.Empty, e);
            grandchild2ValidatedCallCount++;
        };
        int child3ValidatingCallCount = 0;
        child3.Validating += (sender, e) =>
        {
            Assert.Same(child3, sender);
            Assert.False(e.Cancel);
            child3ValidatingCallCount++;
        };
        int child3ValidatedCallCount = 0;
        child3.Validated += (sender, e) =>
        {
            Assert.Same(child3, sender);
            Assert.Same(EventArgs.Empty, e);
            child3ValidatedCallCount++;
        };
        int grandchild3ValidatingCallCount = 0;
        grandchild3.Validating += (sender, e) => grandchild3ValidatingCallCount++;
        int grandchild3ValidatedCallCount = 0;
        grandchild3.Validated += (sender, e) => grandchild3ValidatedCallCount++;
        int child4ValidatingCallCount = 0;
        child4.Validating += (sender, e) => child4ValidatingCallCount++;
        int child4ValidatedCallCount = 0;
        child4.Validated += (sender, e) => child4ValidatedCallCount++;
        int child5ValidatingCallCount = 0;
        child5.Validating += (sender, e) =>
        {
            Assert.Same(child5, sender);
            Assert.False(e.Cancel);
            child5ValidatingCallCount++;
        };
        int child5ValidatedCallCount = 0;
        child5.Validated += (sender, e) =>
        {
            Assert.Same(child5, sender);
            Assert.Same(EventArgs.Empty, e);
            child5ValidatedCallCount++;
        };
        int child6ValidatingCallCount = 0;
        child6.Validating += (sender, e) =>
        {
            Assert.Same(child6, sender);
            Assert.False(e.Cancel);
            child6ValidatingCallCount++;
        };
        int child6ValidatedCallCount = 0;
        child6.Validated += (sender, e) =>
        {
            Assert.Same(child6, sender);
            Assert.Same(EventArgs.Empty, e);
            child6ValidatedCallCount++;
        };
        int child7ValidatingCallCount = 0;
        child7.Validating += (sender, e) =>
        {
            Assert.Same(child7, sender);
            Assert.False(e.Cancel);
            child7ValidatingCallCount++;
        };
        int child7ValidatedCallCount = 0;
        child7.Validated += (sender, e) =>
        {
            Assert.Same(child7, sender);
            Assert.Same(EventArgs.Empty, e);
            child7ValidatedCallCount++;
        };
        int child8ValidatingCallCount = 0;
        child8.Validating += (sender, e) => child8ValidatingCallCount++;
        int child8ValidatedCallCount = 0;
        child8.Validated += (sender, e) => child8ValidatedCallCount++;

        Assert.Equal(!cancel, control.ValidateChildren(validationConstraints));
        Assert.Equal(0, validatingCallCount);
        Assert.Equal(0, validatedCallCount);
        Assert.Equal(1, child1ValidatingCallCount);
        Assert.Equal(expectedChild1CallCount, child1ValidatedCallCount);
        Assert.Equal(0, grandchild1ValidatingCallCount);
        Assert.Equal(0, grandchild1ValidatedCallCount);
        Assert.Equal(1, child2ValidatingCallCount);
        Assert.Equal(1, child2ValidatedCallCount);
        Assert.Equal(expectedGrandchild2CallCount, grandchild2ValidatingCallCount);
        Assert.Equal(expectedGrandchild2CallCount, grandchild2ValidatedCallCount);
        Assert.Equal(1, child3ValidatingCallCount);
        Assert.Equal(1, child3ValidatedCallCount);
        Assert.Equal(expectedGrandchild3CallCount, grandchild3ValidatingCallCount);
        Assert.Equal(expectedGrandchild3CallCount, grandchild3ValidatedCallCount);
        Assert.Equal(expectedChild4CallCount, child4ValidatingCallCount);
        Assert.Equal(expectedChild4CallCount, child4ValidatedCallCount);
        Assert.Equal(expectedChild5CallCount, child5ValidatingCallCount);
        Assert.Equal(expectedChild5CallCount, child5ValidatedCallCount);
        Assert.Equal(expectedChild6CallCount, child6ValidatingCallCount);
        Assert.Equal(expectedChild6CallCount, child6ValidatedCallCount);
        Assert.Equal(expectedChild7CallCount, child7ValidatingCallCount);
        Assert.Equal(expectedChild7CallCount, child7ValidatedCallCount);
        Assert.Equal(0, child8ValidatingCallCount);
        Assert.Equal(0, child8ValidatedCallCount);
    }

    [WinFormsTheory]
    [InlineData((ValidationConstraints)(-1))]
    [InlineData((ValidationConstraints)(0x20))]
    public void ContainerControl_ValidateChildren_InvalidValidationConstraints_ThrowsInvalidEnumArgumentException(ValidationConstraints validationConstraints)
    {
        using ContainerControl control = new();
        Assert.Throws<InvalidEnumArgumentException>("validationConstraints", () => control.ValidateChildren(validationConstraints));
    }

    [WinFormsFact]
    public void ContainerControl_WndProc_InvokeMouseHoverWithHandle_Success()
    {
        using SubContainerControl control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        int callCount = 0;
        control.MouseHover += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        Message m = new()
        {
            Msg = (int)PInvokeCore.WM_MOUSEHOVER,
            Result = 250
        };
        control.WndProc(ref m);
        Assert.Equal(IntPtr.Zero, m.Result);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsFact]
    public void ContainerControl_WndProc_InvokeSetFocusWithHandle_Success()
    {
        using Control child1 = new();
        using Control child2 = new();
        using SubContainerControl control = new();
        control.Controls.Add(child1);
        control.Controls.Add(child2);
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        Message m = new()
        {
            Msg = (int)PInvokeCore.WM_SETFOCUS,
            Result = 250
        };
        control.WndProc(ref m);
        Assert.Equal(IntPtr.Zero, m.Result);
        Assert.Null(control.ActiveControl);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsFact]
    public void ContainerControl_WndProc_InvokeSetFocusWithActiveControlWithHandle_Success()
    {
        using Control child1 = new();
        using Control child2 = new();
        using SubContainerControl control = new();
        control.Controls.Add(child1);
        control.Controls.Add(child2);
        control.ActiveControl = child2;
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        Message m = new()
        {
            Msg = (int)PInvokeCore.WM_SETFOCUS,
            Result = 250
        };
        control.WndProc(ref m);
        Assert.Equal(250, m.Result);
        Assert.Same(child2, control.ActiveControl);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsFact]
    public void ContainerControl_OnMove_HidesToolTip_IfToolTipIsShown()
    {
        using Control control = new();
        using SubContainerControl container = new();
        container.Controls.Add(control);
        container.SetTopLevel();
        container.CreateControl();

        // Simulate that a keyboard toolTip is shown
        KeyboardToolTipStateMachine instance = KeyboardToolTipStateMachine.Instance;
        instance.TestAccessor().Dynamic._currentTool = control;
        instance.TestAccessor().Dynamic._currentState = (byte)2;

        container.MoveContainer();
        IKeyboardToolTip currentTool = instance.TestAccessor().Dynamic._currentTool;
        string currentState = instance.TestAccessor().Dynamic._currentState.ToString();

        Assert.Null(currentTool);
        Assert.Equal("Hidden", currentState);

        Assert.True(control.IsHandleCreated);
        Assert.True(container.IsHandleCreated);
    }

    [WinFormsFact]
    public void ContainerControl_OnResize_HidesToolTip_IfToolTipIsShown()
    {
        using Control control = new();
        using SubContainerControl container = new();
        container.Controls.Add(control);
        container.SetTopLevel();
        container.CreateControl();

        // Simulate that a keyboard toolTip is shown
        KeyboardToolTipStateMachine instance = KeyboardToolTipStateMachine.Instance;
        instance.TestAccessor().Dynamic._currentTool = control;
        instance.TestAccessor().Dynamic._currentState = (byte)2;

        container.ResizeContainer();
        IKeyboardToolTip currentTool = instance.TestAccessor().Dynamic._currentTool;
        string currentState = instance.TestAccessor().Dynamic._currentState.ToString();

        Assert.Null(currentTool);
        Assert.Equal("Hidden", currentState);

        Assert.True(control.IsHandleCreated);
        Assert.True(container.IsHandleCreated);
    }

    [WinFormsFact]
    public void ContainerControl_OnResize_DoNothing_IfInstanceIsNotCreated()
    {
        using Control control = new();
        using SubContainerControl container = new();
        container.Controls.Add(control);
        container.CreateControl();

        container.ResizeContainer();
        object instance = typeof(KeyboardToolTipStateMachine).GetField("s_instance", BindingFlags.Static | BindingFlags.NonPublic).GetValue(null);

        Assert.Null(instance);
        Assert.True(control.IsHandleCreated);
        Assert.True(container.IsHandleCreated);
    }

    [WinFormsFact]
    public void ContainerControl_OnMove_DoNothing_IfInstanceIsNotCreated()
    {
        using Control control = new();
        using SubContainerControl container = new();
        container.Controls.Add(control);
        container.CreateControl();

        container.MoveContainer();
        object instance = typeof(KeyboardToolTipStateMachine).GetField("s_instance", BindingFlags.Static | BindingFlags.NonPublic).GetValue(null);

        Assert.Null(instance);
        Assert.True(control.IsHandleCreated);
        Assert.True(container.IsHandleCreated);
    }

    private class SubControl : Control
    {
        public new void SetStyle(ControlStyles flag, bool value) => base.SetStyle(flag, value);
    }

    public class SubContainerControl : ContainerControl
    {
        public new const int ScrollStateAutoScrolling = ScrollableControl.ScrollStateAutoScrolling;

        public new const int ScrollStateHScrollVisible = ScrollableControl.ScrollStateHScrollVisible;

        public new const int ScrollStateVScrollVisible = ScrollableControl.ScrollStateVScrollVisible;

        public new const int ScrollStateUserHasScrolled = ScrollableControl.ScrollStateUserHasScrolled;

        public new const int ScrollStateFullDrag = ScrollableControl.ScrollStateFullDrag;

        public new SizeF AutoScaleFactor => base.AutoScaleFactor;

        public new bool CanEnableIme => base.CanEnableIme;

        public new bool CanRaiseEvents => base.CanRaiseEvents;

        public new CreateParams CreateParams => base.CreateParams;

        public new Cursor DefaultCursor => base.DefaultCursor;

        public new ImeMode DefaultImeMode => base.DefaultImeMode;

        public new Padding DefaultMargin => base.DefaultMargin;

        public new Size DefaultMaximumSize => base.DefaultMaximumSize;

        public new Size DefaultMinimumSize => base.DefaultMinimumSize;

        public new Padding DefaultPadding => base.DefaultPadding;

        public new Size DefaultSize => base.DefaultSize;

        public new bool DesignMode => base.DesignMode;

        public new bool DoubleBuffered
        {
            get => base.DoubleBuffered;
            set => base.DoubleBuffered = value;
        }

        public new EventHandlerList Events => base.Events;

        public new int FontHeight
        {
            get => base.FontHeight;
            set => base.FontHeight = value;
        }

        public new ImeMode ImeModeBase
        {
            get => base.ImeModeBase;
            set => base.ImeModeBase = value;
        }

        public void MoveContainer() => base.OnMove(EventArgs.Empty);

        public void ResizeContainer() => base.OnResize(EventArgs.Empty);

        public new bool ResizeRedraw
        {
            get => base.ResizeRedraw;
            set => base.ResizeRedraw = value;
        }

        public new bool ShowFocusCues => base.ShowFocusCues;

        public new bool ShowKeyboardCues => base.ShowKeyboardCues;

        public new bool HScroll
        {
            get => base.HScroll;
            set => base.HScroll = value;
        }

        public new bool VScroll
        {
            get => base.VScroll;
            set => base.VScroll = value;
        }

        public new AutoSizeMode GetAutoSizeMode() => base.GetAutoSizeMode();

        public new bool GetScrollState(int bit) => base.GetScrollState(bit);

        public new bool GetStyle(ControlStyles flag) => base.GetStyle(flag);

        public new bool GetTopLevel() => base.GetTopLevel();

        public new void OnAutoValidateChanged(EventArgs e) => base.OnAutoValidateChanged(e);

        public new void OnCreateControl() => base.OnCreateControl();

        public new void OnFontChanged(EventArgs e) => base.OnFontChanged(e);

        public new void OnLayout(LayoutEventArgs e) => base.OnLayout(e);

        public new void OnParentChanged(EventArgs e) => base.OnParentChanged(e);

        public void SetTopLevel() => SetTopLevel(true);

        public new void UpdateDefaultButton() => base.UpdateDefaultButton();

        public new void WndProc(ref Message m) => base.WndProc(ref m);
    }
}
